Men have gone into space to explore the moon and to do _____ and experiments.
  A) invention
  B) structure
  C) research
  D) procedure

  A _____ is an idea that is suggested as an explanation for something, but that has not
  been proved to be true.
  A) pattern
  B) feature
  C) research
  D) hypothesis

  In that part of our country everything is sold inexpensively. "Inexpensively" means _____ .
  A) cheaply
  B) entirely
  C) wisely
  D) firmly

  A group of people having the same religion, job, etc. are a _____ .
  A) category
  B) community
  C) missionary
  D) government

  A: It's very hot in this room.
  B: _____ ?
  A: Yes, please do.
  A) All right. Do you want me check it for you
  B) Would you like me to open the window
  C) Excuse me, but could you give me some more details
  D) Don't worry about it. Where is the window

  A: She's one of our _____ workers.
  B: I don't think you know her well.
  A) obvious
  B) honest
  C) delicious
  D) tropical

  In the winter, people prefer to swim _____ .
   A) at the door
   B) indoors
   C) outdoors
   D) behind the door

  While the telescope has _____ man's vision in space, the microscope has
  made him aware of small living things.
  A) confined
  B) restricted
  C) extended
  D) limited

  Pedestrians should take extra care on busy country roads. "Pedestrian"
  means _____ .
  A) customer
  B) spectator
  C) passenger
  D) passer-by

  Children all over the world should be taught that the pollution of nature is a great _____
  A) scene
  B) sign
  C) sin
  D) sight